Piston-valve.



PATENTED MAY`14, 1907.

y.' KINANDER. PISTON VALVE.

' .QPFLIUATION FILED AUG. 28. 1906.

/NVENTOH ATTORNEYS Uxrrnn rm'rns PATENT crimen.

i PEWTER KlNANDlClt. F lvllNNliAlOlilS, MlNNlCSO'lA.

PISTON-VALVE'.

No. 853,803. Specification of i Application led Aggust 28,

Be it known that I, PETER KINANnEa, a citizen ottheitlhi-ited States,anda resident of Minneapolis, in the county of Hennepin and State ofMinnesota, have invented. a new and.. Improved Piston-Valve, of whichthe following is 'a full, clear, and exact description.

This invention relates to certain improvements in piston valvesespeciallyl designed for use in controlling the flow of motiveiluid tosteam engines, hydraulic motors, and the like, although it is evidentthat the valve may be used for other purposes.-

Reference is te. be had to ther accompanying drawings vforming a part ofthis speeilieation, in which similar characters i"re't'erer1ce indicatecorresponding"parts in all the iigures, in which Figure 1 is alongitudinal section through the valve and valve casinf.: Fig. 2 .is anenlarged detail oli. the port openings through ,valve uponopeninguncovers the valve `bushing; and Fig. 3 is a modilied form of theport openings.

The specific iorm of the invention which I have illustra-ted. in thedrawings.involves a cylindrical Valve casing l, having a bushing 2tightly fitting the inner wall thereoi', and having heads 3 rigidlysecured to the ends` of this cylindrical body. Within the bushing isarranged the valve having its valve stem 4 extending through a packinghox 5 in one o4.' the ends of the easings. Opening into the valve casingand bushing at opposite ends thereof, are two pipes (i united to a T-ioint 7- hy means of unions 8, whereby the motive Huid entering theT-joint 7 througha pipe 9 may lpass to either or both ends of the valvecasing. Surrounding the valve casing at points a short distance fromcach side of the center, are two annular recesses 10, each communieatingat one side with one ot' the conduits 11 extending to the cylinder ofthe engine or hydraulic motor as the case may he. The bushing 2 atpoints adjacent these two annularrecesses is provided with Aopenings 12,whereby the recesses may communicate with the interior of the bushing,and these, openings 12 are preferably so formed that as the valve isopened only a small passage is l'ormed, While as .the valve is openedstill wider, the size of the passage is very materially increased. Theseopenings 12 ma)Y he triangular in shape, as shown in Fig. 2, so that:the merely the upon being and more 0f' pointed end of the triangle,While opened further it uncovers more ...12Vis first uncovered l LettersPatent. Patented May 14, 1907. e. seaninssasss. l

the triangle toward its base. In F ig. 3 a modified form is shown inwhich a plurality of openings 12?, 12" and 12" are employedv andtsoarranged--that the smallest opening then the larger t pen\ing12lian'd finally the largest opening 12". l is evident that variousdiil'erent forms oi opt\n ings may De employed. it only l-eing essentialthat the openings or arrangexmnt ol openings shall be such that theircapacity is greatly increased as the valve iso pened. The valve itselfcomprises a 'hollow cylin-i drical casing, having a large. annularrecess, 13 surroulnlingl it at a point intermediate itsiy ends, andhaving the portion heyond said recess closely ,ing The outer ends of theifalve are provided with a large number oy openings 14.

which may be brought in colinlinnn-ation with the port openings 12 aslthe-a, valve is k moved longitudinally', while theputer wall of thevalve. at a point interimdiate alle;` annular recess 13 and the openings14 is provided with two packing strips l5 hearing i the bushing andhaving a plurality-:cf pins 16 extending through the wall ol" the valvie onto the inside, and having enlarged headstl, so that the steam orother motive fluid within theI valve and valve. casing may hear againstthe enlarged heads 17 and keep the )arlting strip 15 closely in contactwith the bushing to make a more elli'cient joint. '.llle valve being'hollow permits of open comnnn'iioation between the two. ends of thevalve casing' at all times, so that it is not positively essential thattwo pipes be provided, hut by the con-" l struction shown, a slightlygrez'tter freedom of flow is permittt-id. The valve is secured to thcValve stem 4 by a huh 18 carriedv by ra.- dial-spolwsY not shown, or inany other inanner ,so.that the motive lluid may freely pass through thevalve longitudinally. ln the valve iasing and bushing there provided anoutlet or'exhaust passage 19 connnunieating with a discharge pipe 2() bywhich motive iuid returning .from the cylinder may esca-)e T 1eoperation of my improved valve is somewhat similar to that of otherdouble. valves previously employed but may he described in detail asfollewsz'The motive. iluid enters the pipe 9 and completely fills theinner chamber ot' the valve casing and of the valve but is preventedfrom iiowing to the cylinderwhile valve, remains in the poJ` the sitionas showinI As soon as the valve is iitting the inner Wall of the hushlOOIOS

